r-band image of W0410–0913 (left-panel) and W0831+0140 (right-panel). In both panels, black circles and polygons show the masked area that we did not use for our LBG selection (see Section 2.1 for details). The blue circles and arrows indicate the hot DOGs positions, and the cyan circle represents the largest area centred on the hot DOG within the image bounds. The red circles are candidate LBG companions.